Having built a reputation for extreme high-end performance with the original MARS, MARS II and ARES cards, ASUS' ROG series returns with the ROG ARES II Radeon HD 7990, a monster dual-GPU card utilizing two Radeon HD 7970 GHz Edition GPUs and a hybrid liquid/air cooling system. We put this juggernaut through its paces.

Having built a reputation for extreme high-end performance with the original MARS, MARS II and ARES cards, ASUS' ROG series returns with the ROG ARES II Radeon HD 7990, a monster dual-GPU card utilizing two Radeon HD 7970 GHz Edition GPUs and a hybrid liquid/air cooling system. We take a closer look.

The long-rumored dual-GPU Radeon HD 7990 has finally appeared, although not from AMD as you might have expected. Instead, add-in partner PowerColor has taken things into its own hands and created the Devil 13, a dual-GPU triple slot card utilizing two Tahiti XT Radeon HD 7970 GPUs clocked at 925MHz. We find out if it was worth the wait.